package com.chen.senior;

// 管程法

// 生产者、消费者、产品、缓冲区
public class TestPC {
    public static void main(String[] args) {

        SynContainer container = new SynContainer();
        new Producer(container).start();
        new Consumer(container).start();
    }
}

// 生产者
class Producer extends Thread {
    private SynContainer container;

    public Producer(SynContainer container) {
        this.container = container;
    }

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            container.push(new Chicken(i));
            System.out.println("生产了1只鸡, 库存：" + container.count);
        }
    }
}

// 消费者
class Consumer extends Thread {

    private SynContainer container;

    public Consumer(SynContainer container) {
        this.container = container;
    }

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("消费了第" + container.pop().id + "只鸡" + ",库存：" + container.count);
        }
    }

}

// 产品
class Chicken {
    int id;

    public Chicken(int id) {
        this.id = id;
    }
}

// 缓冲区
class SynContainer {
    // 容器大小
    private Chicken[] chickens = new Chicken[10];
    // 容器计数器
    int count = 0;

    // 生产者放入产品
    public synchronized void push(Chicken chicken) {
        // 如果容器满了，就需要等待消费者消费
        if (count == chickens.length) {
            // 通知消费者消费，生产等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        // 如果没有满，就需要继续添加产品
        chickens[count] = chicken;
        count++;
        // 通知消费者消费
        this.notifyAll();
    }

    // 消费者拿走产品
    public synchronized Chicken pop() {
        // 判断能否消费
        if (count == 0) {
            // 等待生产者生产，消费者等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        // 如果可以消费
        count--;
        Chicken chicken = chickens[count];

        // 吃完了，通知生产者生产
        this.notifyAll();
        return chicken;
    }

}